US8791206B2 - Polypropylene composition and molded article of the same - Google Patents

Polypropylene composition and molded article of the same Download PDF

Info

Publication number
US8791206B2
US8791206B2 US13/792,447 US201313792447A US8791206B2 US 8791206 B2 US8791206 B2 US 8791206B2 US 201313792447 A US201313792447 A US 201313792447A US 8791206 B2 US8791206 B2 US 8791206B2
Authority
US
United States
Prior art keywords
weight
polypropylene
polypropylene composition
ethylene
molded article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US13/792,447
Other versions
US20130261263A1 (en
Inventor
Toshihiko ASAI
Hajime Miwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Assigned to TOYODA GOSEI CO., LTD. reassignment TOYODA GOSEI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASAI, TOSHIHIKO, MIWA, HAJIME
Publication of US20130261263A1 publication Critical patent/US20130261263A1/en
Application granted granted Critical
Publication of US8791206B2 publication Critical patent/US8791206B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
    • C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE

Definitions

  • the present invention relates to a polypropylene composition mainly composed of polypropylene copolymer and having excellent low-temperature impact resistance while maintaining rigidity, and a molded article thereof.
  • Patent Document 1 there is disclosed a polypropylene composition having a structure comprising polypropylene as a matrix phase and an elastomer as a dispersion phase, in which polyethylene is present in the dispersion phase, in order to obtain a balance between the rigidity and the low-temperature impact resistance.
  • this compounding system is difficult to be applicable to a molded article particularly requiring fluidity (for example, an AB pad required to have a thick portion and a thin portion).
  • Patent Document 2 there is disclosed a composition comprising PP composition comprising polypropylene, low-density polyethylene, an ethylene-olefin copolymer rubber and the like, and a peroxide blended in the PP composition in a predetermined amount, as a material for an AB pad having a thick portion and a thin portion.
  • this compounding system is difficult to achieve a balance between the rigidity and the low-temperature impact resistance.
  • an object of the present invention is to provide a polypropylene composition having high fluidity and excellent low-temperature impact resistance while maintaining rigidity, and a molded article thereof.
  • the present invention provides a polypropylene composition comprising:
  • a blending mixture comprising 35 to 45% by weight of a polypropylene copolymer having an ethylene content of 4 to 20% by weight, 7 to 12% by weight of high-density polyethylene, 40 to 50% by weight of an ethylene- ⁇ -olefin copolymer rubber, and 5 to 10% by weight of a compatibilizer, and
  • the present invention provides a molded article of the above polypropylene composition.
  • Polypropylene copolymer is a polypropylene block copolymer containing 4 to 20% by weight of ethylene.
  • ethylene content is less than 4% by weight, there is a concern that impact strength is decreased or a flow mark caused by deterioration in rubber dispersibility is generated.
  • the ethylene content exceeds 20% by weight, there is a concern that deterioration in heat resistance or rigidity occurs.
  • High-density polyethylene is preferably a polyethylene having a density of 0.96 g/cm 3 or more, more preferably, from 0.96 g/cm 3 to 0.98 g/cm 3 .
  • the rigidity of the polypropylene composition can be maintained, and further, the low-temperature impact resistance thereof can also be secured by dispersing the high-density polyethylene in a rubber to reinforce the rubber.
  • the density is less than 0.96 g/cm 3 , it becomes difficult to achieve the above effects.
  • ⁇ -olefins examples include propylene, butene, pentene and the like.
  • an ethylene-butene copolymer rubber is preferable. This largely contributes to the low-temperature impact resistance.
  • the compatibilizer examples include a propylene-butene copolymer and an ethylene-propylene copolymer, and the propylene-butene copolymer is preferable.
  • the compatibilizer enhances compatibility between polypropylene copolymer and rubber, and enhances tensile elongation of the rubber.
  • Examples of the flow adjusters include ketone peroxides, peroxyketals, hydroperoxides, dialkyl peroxides, diacyl peroxides, peroxydicarbonates, peroxyesters and the like. However, dialkyl peroxides are preferable.
  • the fluidity of the polypropylene composition is improved by blending the flow adjuster, because molecular chain of polypropylene copolymer or rubber is broken.
  • the polypropylene composition of the present invention comprises a blending mixture comprising 35 to 45% by weight of the polypropylene copolymer, 7 to 12% by weight of the high-density polyethylene, 40 to 50% by weight of the ethylene- ⁇ -olefin copolymer rubber, and 5 to 10% by weight of the compatibilizer, and further comprises the flow adjuster in an amount of 0.05 to 0.1 parts by weight based on 100 parts by weight of the blending mixture.
  • the polypropylene composition of the present invention may contain other components such as stabilizer, to the extent that they do not impair the effect of the present invention.
  • the other components includes phenolic antioxidant, amine thermal stabilizer, sulfur thermal stabilizer, phosphate thermal stabilizer, hindered amine light stabilizer, benzoate ultraviolet absorber, benzotriazole ultraviolet absorber, benzophenone ultraviolet absorber, triazine ultraviolet absorber.
  • the polypropylene composition of the present invention can be subjected to a known molding treatment such as injection molding, to provide a molded article.
  • a known molding treatment such as injection molding
  • the molded articles of the present invention there can be exemplified automobile parts such as instrument panels, console boxes and side moldings, as well as the AB pads.
  • the present invention can provide a polypropylene composition having high fluidity and excellent low-temperature impact resistance while maintaining rigidity, and a molded article thereof.
  • MFR melt flow rate
  • Izod impact strength Izod impact strength
  • tensile strength and elongation tensile strength and elongation
  • bending strength and elastic modulus tensile strength and elongation
  • the MFR was measured in accordance with ISO 1133 (measurement temperature: 230° C.).
  • the Izod impact strength (with notch) was measured in accordance with ISO 180 (measurement temperatures: 23° C. and ⁇ 45° C.).
  • the tensile strength and elongation were measured in accordance with ISO 527.
  • the bending strength and elastic modulus were measured in accordance with ISO 178.
  • the results of physical property evaluation are shown in Table 1.
  • the samples of Examples show high fluidity and excellent impact resistance even at low temperature while securing the bending elastic modulus.
  • the samples of Comparative Examples 1 and 2 are decreased in the blending amount of high-density polyethylene, so that the impact resistance at low temperature is deteriorated.
  • the sample of Comparative Example 3 contains no compatibilizer, so that the tensile elongation is decreased.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention relates to a polypropylene composition containing: 100 parts by weight of a blending mixture containing 35 to 45% by weight of a polypropylene copolymer having an ethylene content of 4 to 20% by weight, 7 to 12% by weight of high-density polyethylene, 40 to 50% by weight of an ethylene-α-olefin copolymer rubber, and 5 to 10% by weight of a compatibilizer, and 0.05 to 0.1 parts by weight of a flow adjuster.

Description

TECHNICAL FIELD
The present invention relates to a polypropylene composition mainly composed of polypropylene copolymer and having excellent low-temperature impact resistance while maintaining rigidity, and a molded article thereof.
BACKGROUND ART
Polypropylene (PP) compositions mainly composed of polypropylene, in which ethylene-propylene-based rubbers, inorganic fillers and the like are blended, have excellent rigidity and impact resistance and have high moldability, and therefore have been widely used for interior and exterior parts of automobiles or the like. They have also been used for air-bag pads (hereinafter also referred to as AB pads) of automobiles, and characteristics such as fluidity and impact resistance at low temperature are required therefor. In the polypropylene compositions, however, it is generally difficult to achieve both of the rigidity and the low-temperature impact resistance at the same time, and under the present circumstances, one of the characteristics cannot help being sacrificed to some extent.
In Patent Document 1, there is disclosed a polypropylene composition having a structure comprising polypropylene as a matrix phase and an elastomer as a dispersion phase, in which polyethylene is present in the dispersion phase, in order to obtain a balance between the rigidity and the low-temperature impact resistance. However, this compounding system is difficult to be applicable to a molded article particularly requiring fluidity (for example, an AB pad required to have a thick portion and a thin portion).
In Patent Document 2, there is disclosed a composition comprising PP composition comprising polypropylene, low-density polyethylene, an ethylene-olefin copolymer rubber and the like, and a peroxide blended in the PP composition in a predetermined amount, as a material for an AB pad having a thick portion and a thin portion. However, this compounding system is difficult to achieve a balance between the rigidity and the low-temperature impact resistance.
  • Patent Document 1: JP-A-11-130923
  • Patent Document 2: JP-A-2001-62861
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a polypropylene composition having high fluidity and excellent low-temperature impact resistance while maintaining rigidity, and a molded article thereof.
The present invention provides a polypropylene composition comprising:
100 parts by weight of a blending mixture comprising 35 to 45% by weight of a polypropylene copolymer having an ethylene content of 4 to 20% by weight, 7 to 12% by weight of high-density polyethylene, 40 to 50% by weight of an ethylene-α-olefin copolymer rubber, and 5 to 10% by weight of a compatibilizer, and
0.05 to 0.1 parts by weight of a flow adjuster.
Further, the present invention provides a molded article of the above polypropylene composition.
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the respective elements in the present invention will be exemplified below.
1. Polypropylene Copolymer
Polypropylene copolymer is a polypropylene block copolymer containing 4 to 20% by weight of ethylene. When the ethylene content is less than 4% by weight, there is a concern that impact strength is decreased or a flow mark caused by deterioration in rubber dispersibility is generated. On the other hand, when the ethylene content exceeds 20% by weight, there is a concern that deterioration in heat resistance or rigidity occurs.
2. High-Density Polyethylene
High-density polyethylene is preferably a polyethylene having a density of 0.96 g/cm3 or more, more preferably, from 0.96 g/cm3 to 0.98 g/cm3. The rigidity of the polypropylene composition can be maintained, and further, the low-temperature impact resistance thereof can also be secured by dispersing the high-density polyethylene in a rubber to reinforce the rubber. When the density is less than 0.96 g/cm3, it becomes difficult to achieve the above effects.
3. Ethylene-α-Olefin Copolymer Rubber
Examples of the α-olefins include propylene, butene, pentene and the like. However, an ethylene-butene copolymer rubber is preferable. This largely contributes to the low-temperature impact resistance.
4. Compatibilizer
Examples of the compatibilizer include a propylene-butene copolymer and an ethylene-propylene copolymer, and the propylene-butene copolymer is preferable. The compatibilizer enhances compatibility between polypropylene copolymer and rubber, and enhances tensile elongation of the rubber.
5. Flow Adjuster
Examples of the flow adjusters include ketone peroxides, peroxyketals, hydroperoxides, dialkyl peroxides, diacyl peroxides, peroxydicarbonates, peroxyesters and the like. However, dialkyl peroxides are preferable.
The fluidity of the polypropylene composition is improved by blending the flow adjuster, because molecular chain of polypropylene copolymer or rubber is broken.
6. Blending Amount
The above described polypropylene copolymer, high-density polyethylene, ethylene-α-olefin copolymer rubber, compatibilizer and flow adjuster are properly blended in such amounts that excellent low-temperature impact resistance can be secured while maintaining rigidity. For example, the polypropylene composition of the present invention comprises a blending mixture comprising 35 to 45% by weight of the polypropylene copolymer, 7 to 12% by weight of the high-density polyethylene, 40 to 50% by weight of the ethylene-α-olefin copolymer rubber, and 5 to 10% by weight of the compatibilizer, and further comprises the flow adjuster in an amount of 0.05 to 0.1 parts by weight based on 100 parts by weight of the blending mixture. The polypropylene composition of the present invention may contain other components such as stabilizer, to the extent that they do not impair the effect of the present invention. Examples of the other components includes phenolic antioxidant, amine thermal stabilizer, sulfur thermal stabilizer, phosphate thermal stabilizer, hindered amine light stabilizer, benzoate ultraviolet absorber, benzotriazole ultraviolet absorber, benzophenone ultraviolet absorber, triazine ultraviolet absorber.
Uses
The polypropylene composition of the present invention can be subjected to a known molding treatment such as injection molding, to provide a molded article. As the molded articles of the present invention, there can be exemplified automobile parts such as instrument panels, console boxes and side moldings, as well as the AB pads.
The present invention can provide a polypropylene composition having high fluidity and excellent low-temperature impact resistance while maintaining rigidity, and a molded article thereof.
EXAMPLES
Three kinds of samples for Examples and three kinds of samples for Comparative Examples were prepared by injection molding, by changing the blending amounts of respective components as shown in Table 1.
Physical property evaluation items are melt flow rate (MFR), Izod impact strength, tensile strength and elongation, and bending strength and elastic modulus.
Measurement methods of respective physical property tests will be described below.
The MFR was measured in accordance with ISO 1133 (measurement temperature: 230° C.).
The Izod impact strength (with notch) was measured in accordance with ISO 180 (measurement temperatures: 23° C. and −45° C.).
The tensile strength and elongation were measured in accordance with ISO 527.
The bending strength and elastic modulus were measured in accordance with ISO 178.
The results of physical property evaluation are shown in Table 1. The samples of Examples show high fluidity and excellent impact resistance even at low temperature while securing the bending elastic modulus. On the other hand, the samples of Comparative Examples 1 and 2 are decreased in the blending amount of high-density polyethylene, so that the impact resistance at low temperature is deteriorated. Further, the sample of Comparative Example 3 contains no compatibilizer, so that the tensile elongation is decreased.
TABLE 1
Ex. 1 Ex. 2 Ex. 3 Comp. Ex. 1 Comp. Ex. 2 Comp. Ex. 3
Blending Polypropylene Ethylene Content: 40 40 40 45 50 40
Copolymer 10.6 wt %
High-Density Density: 10 10 10 5 0 10
Polyethylene 0.967 g/cm3
Rubber Ethylene-Butene 40 40 45 40 40 50
Rubber
Compatibilizer Propylene-Butene 10 10 5 10 10 0
Copolymer
Flow Adjuster Dibutyl Peroxide 0.05 0.1 0.05 0.05 0.05 0.05
Others Stabilizer, etc. 0.7 0.7 0.7 0.7 0.7 0.7
Physical MFR (g/10 min) 230° C. 8.29 9.78 7.42 9.76 9.18 4.65
Properties Izod Impact Strength  23° C. 53.7 51.2 45.6 49.5 49.4 47.3
with Notch (KJ/m2) −45° C. 75.1 81.8 91.2 18.3 20.6 95.7
Tensile Mpa Yield Strength 12.0 11.3 10.0 11.6 12.3 8.8
Breaking Strength >11.6 >11.1 >9.5 >10.9 >11.5 7.9
% Breaking >510 >500 >567 >557 >540 128
Elongation
Bending Mpa Strength 10.7 10.3 9.2 11.3 11.9 8.3
Elastic Modulus 322 319 298 358 388 293
While the present invention has been described in detail with reference to the specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the present invention.
The present application is based on the Japanese Patent Application No. 2012-075895 filed on Mar. 29, 2012, and the entire contents thereof are incorporated herein by reference. All references cited herein are incorporated in their entirety.

Claims (4)

What is claimed is:
1. A polypropylene composition comprising:
a blended mixture in an amount of 100 parts by weight, the blended mixture comprising:
35 to 45% by weight of a polypropylene copolymer having an ethylene content of 4 to 20% by weight,
7 to 12% by weight of high-density polyethylene having a density of 0.96 g/cm3 or more,
40 to 50% by weight of an ethylene-α-olefin copolymer rubber, and
5 to 10% by weight of a compatibilizer, and
a flow adjuster in an amount of 0.05 to 0.1 parts by weight.
2. The polypropylene composition according to claim 1, wherein the ethylene-α-olefin copolymer contains an α-olefin selected from the group consisting of propylene, butene and pentene.
3. The polypropylene composition according to claim 1, wherein the flow adjuster is selected from the group consisting of ketone peroxides, peroxyketals, hydroperoxides, dialkyl peroxides, diacyl peroxides, peroxydicarbonates, and peroxyesters.
4. A molded article comprising the polypropylene composition described in claim 1.
US13/792,447 2012-03-29 2013-03-11 Polypropylene composition and molded article of the same Expired - Fee Related US8791206B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-075895 2012-03-29
JP2012075895A JP5747853B2 (en) 2012-03-29 2012-03-29 Polypropylene composition and molded article thereof

Publications (2)

Publication Number Publication Date
US20130261263A1 US20130261263A1 (en) 2013-10-03
US8791206B2 true US8791206B2 (en) 2014-07-29

Family

ID=49235871

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/792,447 Expired - Fee Related US8791206B2 (en) 2012-03-29 2013-03-11 Polypropylene composition and molded article of the same

Country Status (3)

Country Link
US (1) US8791206B2 (en)
JP (1) JP5747853B2 (en)
CN (1) CN103360669B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10450491B2 (en) 2016-08-08 2019-10-22 Ticona Llc Thermally conductive polymer composition for a heat sink

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113337039A (en) * 2021-06-16 2021-09-03 厦门永晋鸿塑胶工业有限公司 High-fluidity high-impact-resistance polypropylene material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11130923A (en) 1997-05-13 1999-05-18 Grand Polymer:Kk Polypropylene resin composition and manufacture thereof
JP2001062861A (en) 1999-08-24 2001-03-13 Toyoda Gosei Co Ltd Resin molding

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63156842A (en) * 1986-12-19 1988-06-29 Chisso Corp Polypropylene composition
JPH0725985B2 (en) * 1988-11-21 1995-03-22 宇部興産株式会社 Polypropylene composition
JPH0480060A (en) * 1990-07-24 1992-03-13 Nec Corp Paper pressing apparatus
AU662202B2 (en) * 1992-02-24 1995-08-24 Montell North America Inc. Polyolefin compositions having good transparency and impact resistance
JP3922858B2 (en) * 1999-12-17 2007-05-30 三井化学株式会社 Car interior skin material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11130923A (en) 1997-05-13 1999-05-18 Grand Polymer:Kk Polypropylene resin composition and manufacture thereof
JP2001062861A (en) 1999-08-24 2001-03-13 Toyoda Gosei Co Ltd Resin molding
US6384137B1 (en) 1999-08-24 2002-05-07 Toyoda Gosei Co., Ltd. Molded resin product having varied wall thickness and resin composition forming the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10450491B2 (en) 2016-08-08 2019-10-22 Ticona Llc Thermally conductive polymer composition for a heat sink
US11028304B2 (en) 2016-08-08 2021-06-08 Ticona Llc Thermally conductive polymer composition for a heat sink

Also Published As

Publication number Publication date
CN103360669B (en) 2015-12-02
US20130261263A1 (en) 2013-10-03
JP5747853B2 (en) 2015-07-15
JP2013203937A (en) 2013-10-07
CN103360669A (en) 2013-10-23

Similar Documents

Publication Publication Date Title
US10351698B2 (en) Blend for use in automobile application
ES2625403T3 (en) Process for the preparation of a composition comprising a heterophasic propylene copolymer and talc
US6590038B2 (en) Polypropylene resin composition
CN107663332A (en) Fire retardant propylene compositions
US8354463B2 (en) Flame retardant thermoplastic elastomers
US10844207B2 (en) Thermoplastic elastomer composition having advanced vibration isolation and thermal resistance, and molded article manufactured therefrom
US9139723B2 (en) Polypropylene resin composition
CN106009271A (en) Modified polypropylene composition and preparation method thereof
CN101903456A (en) Olefin elastic resin composition
US20140011937A1 (en) Polypropylene-based resin composition for automobile parts, and automobile exterior parts
KR20170117109A (en) Thermoplastic polymer composition
US8791206B2 (en) Polypropylene composition and molded article of the same
US7309742B2 (en) Impact copolymer with optimized melt flow, stiffness, and low-temperature impact resistance
KR100714194B1 (en) Polypropylene resin composition for high strength and impact resistant automobile exterior material
KR100865255B1 (en) Polypropylene resin composition excellent in impact resistance and transparency and products comprising the same
JP2013515087A5 (en)
US12234350B2 (en) Olefin-based elastomer composite resin composition for airbag chute, comprising dendrimer
KR102184467B1 (en) Thermoplastic resin composition for vehicle interior material and molded product of vehicle interior material
KR20120100479A (en) Polypropylene resin composition
KR100334161B1 (en) Polypropylene resin composition with excellent molding quality
KR20200098706A (en) Butene polymer composition
JP2018002926A (en) Thermoplastic elastomer composition and air bag housing cover
GB2085452A (en) Olefin copolymer resin compositions
KR20060123914A (en) Polypropylene resin composition
KR20060123884A (en) Polypropylene resin composition

Legal Events

Date Code Title Description
AS Assignment

Owner name: TOYODA GOSEI CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ASAI, TOSHIHIKO;MIWA, HAJIME;REEL/FRAME:029959/0766

Effective date: 20130304

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551)

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

LAPS Lapse for failure to pay maintenance fees

Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20220729